<template>
  <div class="list" ref="wrapper">
      <div>
   <div class="area">
       <div  class="title border-topbottom">当前城市</div>
       <div class="button-list">
       <div class="button-wrapper">
           <div class="button">{{this.currentCity}}</div>
       </div>
   </div>
   </div>
   <div class="area">
       <div  class="title border-topbottom">热门城市</div>
       <div class="button-list">
       <div class="button-wrapper" v-for="item of hotcities" :key=item.id @click="handleCityClick(item.name)">
           <div class="button">{{item.name}}</div>
       </div>
   </div>
   </div>
   <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
       <div  class="title border-topbottom">{{key}}</div>
       <div class="item-list" v-for="innerItem of item" :key=innerItem.id @click="handleCityClick(innerItem.name)">
           <div class="item border-bottom" >{{innerItem.name}}</div>
       </div>
   </div>
   </div>
   </div>
</template>

<script>
import { mapState } from 'vuex'
import Bscroll from 'better-scroll'
export default {
  name: 'CityList',
  mounted () {
    this.scrool = new Bscroll(this.$refs.wrapper)
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  props: {
    hotcities: Array,
    cities: Object,
    letter: String
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scrool.scrollToElement(element)
      }
    }
  },
  methods: {
    handleCityClick (city) {
      this.$store.dispatch('changeCity', city)
      this.$router.push('/')
    }
  }
}
</script>

<style scoped>
  .title {
      line-height: .54rem;
      background: #eee;
      padding-left: .2rem;
      color: #666;
      font-size: .26rem;
  }
  .border-topbottom::before {
     border-color: #ccc
  }
  .border-topbottom::after {
     border-color: #ccc
  }
  .button-list {
      overflow: hidden;
      padding: .1rem .6rem .1rem .1rem;
  }
  .button-wrapper {
      width: 33.33%;
      float: left;
      color: #666;
  }
  .button {
      text-align: center;
      padding: .1rem 0;
      margin: .1rem .1rem;
      border: .02rem solid #ccc;
      border-radius: .06rem;
  }
  .item-list .item {
      line-height: .76rem;
      color: #666;
      padding-left: .2rem;
  }
  .border-bottom::before {
     border-color: #ccc
  }
  .list {
      overflow: hidden;
      position: absolute;
      top:1.58rem;
      left: 0;
      right: 0;
      bottom: 0;
  }

</style>
